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MetaAnnouncement
OCP Summit 2026: Powering AI with Open Innovations in Scale-Up, Scale-Out, and Scale-Across Networks
Summary
At OCP Summit 2026, Meta unveiled next-generation open networking infrastructure for AI, including IcePack, its first liquid-cooled network rack, and IceCube, a 102.4T switch blade delivering 128×800G non-blocking capacity. The Flattened Planar Fabric (FPF) introduces a multiplane scale-out design where each GPU connects via eight independent 100G links to different switches, reducing latency and enabling larger clusters. Meta also shared its BAG super-spine for multi-site aggregation and Tahan, an Ethernet-based 51.2T scale-up switch for MTIA 300 systems. The company launched the Open Switch Platform Architecture (OSPA) initiative with Microsoft and Alibaba to standardize switch platform hardware and software interfaces. Additionally, Meta announced open-source implementations of MetaRoCE, its RDMA transport protocol optimized for AI cluster networks over Ethernet.
Context
Meta presented these networking innovations at OCP Summit 2026 to support large-scale AI workloads, including Muse models and personal AI agent, addressing challenges of power density, latency, and multi-site training.
Approach / What changed
Meta introduced IcePack (liquid-cooled network rack), IceCube (102.4T switch blades), Flattened Planar Fabric (FPF) for scale-out, BAG super-spine for scale-across, Tahan (51.2T Ethernet scale-up switch), OSPA (standardized switch platform), and open-sourced MetaRoCE transport protocol.
Takeaways
IceCube delivers 2x bandwidth over 51.2T platforms with 128×800G non-blocking capacity, using liquid cooling to handle thermal density for gigawatt-scale AI clusters.
Flattened Planar Fabric (FPF) uses a multiplane topology where each GPU connects to eight switches via independent 100G links, enabling larger non-blocking clusters and NIC-level load balancing.
MetaRoCE is an open-source RDMA transport protocol providing congestion control and reliability for collective communication in large-scale Ethernet AI fabrics.
FAQ
What is IceCube?
IceCube is Meta's 102.4 Tbps liquid-cooled switch blade delivering 128×800G non-blocking capacity, running FBOSS. It comes in variants based on Broadcom Tomahawk6C and NVIDIA Spectrum-6 ASICs.
How does Flattened Planar Fabric work?
FPF is a multiplane backend scale-out fabric where each GPU connects via eight independent 100G links to eight different switches. This enables larger non-blocking clusters, reduces network hops, and provides NIC-level hardware load balancing.
What is OSPA?
OSPA is a new OCP initiative co-led by Meta, Microsoft, and Alibaba that standardizes the switch platform layer, including power management, thermal control, inventory management, and firmware updates, to reduce custom engineering for new hardware.
Source and freshness
- Source
- engineering.fb.com
- Published
- Added to Yomu
Summaries are generated from the original by a language model. Check the original before relying on it.
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